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Accounts Receivable, Net - Schedule of Accounts Receivable, Net (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Accounts Notes And Loans Receivable [Line Items]    
Allowance for doubtful accounts $ (130) $ (128)
Accounts receivable, net 11,640 8,534
Security Products
   
Accounts Notes And Loans Receivable [Line Items]    
Accounts receivable, gross 10,334 7,813
Marine Components
   
Accounts Notes And Loans Receivable [Line Items]    
Accounts receivable, gross $ 1,436 $ 849